TreeGridLoaded ({ /* JSONP header, to be possible to load from xxx_Jsonp data source */ 
   "Cfg" : { "id": "CalcCols", "NoVScroll": "1", "NoHScroll": "1"   }, 
   "Cols" : [ 
      { "Name": "X", "Type": "Int"   }, 
      { "Name": "Y", "Type": "Int"   }, 
      { "Name": "A", "Type": "Int", "Formula": "X*Y"   }, 
      { "Name": "B", "Type": "Int", "Formula": "Math.sqrt(X*X+Y*Y)", "Format": "0.00"   }  
   ], 
   "Header" : { "A": "A=X*Y", "B": "B=\u221A(X\u00B2+Y\u00B2)"   }, 
   "Body" : [ 
      [ 
         { "X": "10", "Y": "1"   }, 
         { "X": "3", "Y": "4"   }, 
         { "X": "12", "Y": "8"   }, 
         { "X": "7", "Y": "-8"   }  
      ], 
   ], 
}) /* End of JSONP header */ 